Luxury Military Tritium Gas Sports Waterproof Calendar Quartz Men's Watch Black Silicone Strap White High Quality Imported quartz movement , Silicone strap, soft and comfortable to wear Luminous watch:Swiss H3 Self Luminous System,Tritium gas lighting illuminates for 25 years without electricity or light, many times brighter than normal luminicence Classic Military Style For Men's watch, With Days/Week Function and screw-down crown 30m water resistance, protects your watch from splash and rain, convenient for your daily life, not suitable for swimming and sauna, etc. We have first-class after-sales service, please rest assured purchase, please contact us immediately if there is any quality problem, We will reply you within 24hours ,and provide a satisfactory solution. 12-Month Warranty Service.